Elevator rope device

Abstract

To provide an elevator rope device capable of reducing an overall height of a car frame without being affected by a longitudinal size of a rope shackle when the rope shackle is arranged on the top of the car frame.SOLUTION: A rope device 5 has: an elastic body provided on a car frame 4 to support a cage moving up / down in an elevator hoistway, and elastically supporting multiple main ropes 2 suspending the car frame 4 to the car frame 4; and a rope shackle 6 supporting the elastic body. The rope device connects the main ropes 2 to the car frame 4. The rope device comprises: a rotating shaft fixed to the car frame 4; and a swing part 7 supported rotatably by the rotating shaft and capable of swinging in a seesaw fashion along a direction to which the tension of the main ropes 2 acts. Ends of the main ropes 2 are connected to one side of the swing part 7 and the rope shackle 6 is connected to the other side. A longitudinal direction of the rope shackle 6 is placed on the side of the car frame 4 when viewed from a horizontal direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an elevator rope device that connects a main rope for suspending a car to a car frame. [Background technology]

[0002] In a conventional rope device provided on an elevator car frame, the main rope passes through the car frame and is connected to a rope shackle located on the car compartment side of the car frame. The rope shackle to which the end of the main rope is connected is located between the car frame and the car compartment, and is positioned to protrude from the car frame toward the car compartment (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 4-94386 Summary of the Invention [Problem to be solved by the invention]

[0004] When the rope shackle is positioned so that it protrudes from the car frame toward the car room, it is necessary to secure space between the car frame and the car room to arrange the rope shackle in the longitudinal direction. As a result, the space between the car frame and the car room cannot be reduced to a size equal to or smaller than the longitudinal size of the rope shackle, which poses the problem of making it difficult to reduce the overall height of the car frame. Furthermore, if it is difficult to reduce the overall height of the car frame, this can affect the overhead (OH) dimensions required above the hoistway.

[0005] The present invention has been made to solve the above-mentioned problems, and its object is to provide an elevator rope device that, when a rope shackle is arranged on the upper part of the car frame, can reduce the overall height of the car frame without being affected by the longitudinal size of the rope shackle. [Means for solving the problem]

[0006] The elevator rope device of this invention is provided on a car frame that supports a car that moves up and down in an elevator shaft, and has elastic bodies that elastically support a plurality of main ropes that suspend the car frame on the car frame, and rope shackles on which the elastic bodies are supported, and connects the main ropes to the car frame. The rope device also includes a rotating shaft fixed to the car frame, and a swinging part that is rotatably supported by the rotating shaft and can swing along a direction in which tension of the main ropes acts, and one end of the main rope is connected to one of the swinging parts, and the rope shackle is connected to the other, and the rope shackle is such that, when viewed horizontally, the longitudinal direction of the rope shackle is aligned with the car frame. Above On the side outstandingly It is characterized in that it is arranged [Effects of the Invention]

[0007] The present invention makes it possible to realize an elevator rope device that can reduce the overall height of the car frame without being affected by the longitudinal size of the rope shackle when the rope shackle is arranged on the upper part of the car frame. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an elevator rope device (as a whole) according to a first embodiment of the present invention. [Figure 2] 1 is a plan view showing an elevator rope device of FIG. 1 according to a first embodiment of the present invention. [Figure 3] 2 is a front view showing a main part of the elevator rope device of FIG. 1 according to a first embodiment of the present invention. FIG. [Figure 4] 2 is a perspective view showing a main part of the elevator rope device of FIG. 1 according to embodiment 1 of the present invention. FIG. [Figure 5] 1 is a perspective view (without the front car frame) showing a main part of the elevator rope device of FIG. 1 according to Embodiment 1 of the present invention. [Figure 6] FIG. 10 is a perspective view showing a main portion of an elevator rope device according to a second embodiment of the present invention. [Figure 7] FIG. 7 is a plan view showing the elevator rope device of FIG. 6 according to a second embodiment of the present invention. [Figure 8] 7 is a front view showing a main part of the elevator rope device of FIG. 6 according to a second embodiment of the present invention. FIG. [Figure 9] FIG. 7 is a perspective view showing a main part of the elevator rope device of FIG. 6 according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 FIG. 1 is a perspective view showing an elevator rope device (as a whole) according to embodiment 1 of the present invention. FIG. 2 is a plan view showing the elevator rope device of FIG. 1 according to embodiment 1 of the present invention. FIG. 3 is a front view showing a main part of the elevator rope device of FIG. 1 according to embodiment 1 of the present invention. FIG. 4 is a perspective view showing a main part of the elevator rope device of FIG. 1 according to embodiment 1 of the present invention. FIG. 5 is a perspective view (without the front car frame) showing a main part of the elevator rope device of FIG. 1 according to embodiment 1 of the present invention.

[0010] In the figure, a car 1 and a counterweight (not shown) are suspended in a hoistway by a plurality of ropes 2 (six in this example) that serve as suspension means using a 1:1 roping system. The car 1 has a car chamber 3 and a car frame 4 that supports the car chamber 3. The main rope 2 is wound around a drive sheave (not shown) of a hoist installed at the top of the hoistway. The car 1 and the counterweight are raised and lowered in the hoistway by the rotation of the drive sheave. When the car 1 and the counterweight are raised and lowered in the hoistway, the car 1 is guided by a pair of car guide rails (not shown), and the counterweight is guided by a pair of counterweight guide rails (not shown).

[0011] Rope devices 5 that connect the main ropes 2 to the car frame 4 are provided above the car frame 4. One end of one main rope 2 is connected to one rope device 5, and in this example, six rope devices 5 are arranged. The rope devices 5 have rope shackles 6 that elastically support the main ropes 2 on the car frame 4, and a swinging part 7 to one side of which the end of the main rope 2 is connected and to the rope shackle 6 is connected to the other side.

[0012] A rotating shaft 70 that supports the oscillating unit 7 for rotation is fixed to the upper end of the car frame 4. A pair of oscillating units 71 and 72 are formed in the oscillating unit 7 with the rotating shaft 70 at the center. The oscillating units 71 and 72 are arranged at an angle of approximately 90 degrees with the rotating shaft 70 sandwiched between them. The longitudinal direction of the oscillating unit 71 is arranged horizontally, and the rotating shaft 70 is arranged further outward from the car frame 4 than the end of the oscillating unit 71.

[0013] The rope shackle 6 has a spring 60 that elastically supports the main rope 2 on the car frame 4, and a shackle rod 61 on which the spring 60 is supported. The rope shackle 6 is fixed to the upper part of the car frame 4 and further outside the car frame 4 than the swinging part 7, and is disposed so that the displacement direction of the spring 60 is horizontal.

[0014] An adjustment bolt 8 is disposed on the shackle rod 61, which moves in conjunction with the displacement of the shackle rod 61. The adjustment bolt 8 can be fixed at any position on the shackle rod 61, and is disposed in contact with the upper end of the spring 60. When the shackle rod 61 is displaced, the adjustment bolt 8 moves in conjunction with the displacement and comes into contact with the upper end of the spring 60, thereby compressing the spring 60.

[0015] The longitudinal direction of the swinging part 71 is arranged horizontally, and the end is arranged inside the car frame 4 more than the end of the swinging part 72 and at approximately the same height as the rotating shaft 70. An end of one main rope 2 is connected to the end of the swinging part 71, and the swinging part 71 can swing in a seesaw manner along the direction in which the tension of the main rope 2 acts.

[0016] The longitudinal direction of the swinging part 72 is arranged in the vertical direction, and the end is arranged further outside the car frame 4 than the end of the swinging part 71 and below the rotation shaft 70. The end of the swinging part 72 is connected to the end of the shackle rod 61, and when the swinging part 71 swings, the swinging part 72 swings in a substantially horizontal direction forming an angle of about 90 degrees with respect to the direction in which the tension of the main ropes 2 acts.

[0017] A mounting plate 9 is provided on the top of the car frame 4, on which the rope shackle 6 is placed and supported on its side. The shackle rod 61 is arranged with its longitudinal direction horizontal, and its end on the opposite side to the spring 60 is connected to the swinging part 72. When the swinging part 72 swings, the shackle rod 61 is pulled out in an approximately horizontal direction in tandem, and the load of the main ropes 2 acts on the spring 60 via the shackle rod 61. When viewed from the horizontal direction, the swinging part 7 and rope shackle 6 are both arranged to overlap the car frame 4.

[0018] Furthermore, the height of the upper side of the car frame 4 in the prior art is approximately 200 mm to 250 mm, and the height of the swinging part 7 is formed within 200 mm to 250 mm. Furthermore, although the overall height (longitudinal direction) of the spring 60 may change depending on the car weight, the width remains almost unchanged. Therefore, even if the overall height of the spring 60 changes depending on the car weight, the rope shackle 6 does not affect the vertical size of the car frame 4 because its longitudinal direction is horizontally arranged.

[0019] Next, the operation of the first embodiment configured as described above will be described. When the car 1 is suspended from the main ropes 2, the swinging part 71 is pulled upward and swings counterclockwise around the rotation shaft 70. When the swinging part 71 swings counterclockwise, the swinging part 72 swings approximately horizontally and pulls the shackle rod 61 toward the center of the car frame 4. When the shackle rod 61 is pulled toward the center of the car frame 4, the spring 60 is compressed by the adjustment bolt 8. As a result, a load acts on the rope shackle 6 from the end of the main ropes 2 via the swinging part 7, and the car 1 is elastically supported by the rope shackle 6.

[0020] As described above, according to the first embodiment, the rope device 5 is provided on the car frame 4 supporting the car chamber 3 moving up and down in the elevator hoistway, and has springs 60 that elastically support, on the car frame 4, the plurality of main ropes 2 that suspend the car frame 4, and rope shackles 6 on which the springs 60 are supported, and connects the main ropes 2 to the car frame 4. The rope device 5 further includes a rotating shaft 70 fixed to the car frame 4, and a swinging unit 7 that is rotatably supported by the rotating shaft 70 and can swing in a seesaw manner along the direction in which the tension of the main ropes 2 acts, with the ends of the main ropes 2 connected to the swinging unit 71 and the rope shackle 6 connected to the swinging unit 72. When viewed horizontally, the longitudinal direction of the rope shackle 6 is arranged on the car frame 4 side. Therefore, when the rope shackle 6 is arranged above the car frame 4, an elevator rope device 5 can be realized that can reduce the overall height of the car frame 4 without being affected by the longitudinal size of the rope shackle 6.

[0021] Furthermore, since the oscillating parts 71 and 72 are arranged at approximately 90 degrees to each other with the rotation axis 70 in between, the longitudinal direction of the rope shackle 6 can be arranged horizontally. Therefore, even if the overall height of the spring 60 changes depending on the weight of the car, an elevator rope device 5 can be realized that can reduce the overall height of the car frame 4 without being affected by the longitudinal size of the rope shackle 6.

[0022] Furthermore, since the displacement direction of the spring 60 of the rope shackle 6 is arranged horizontally, even if the overall height of the spring 60 changes depending on the weight of the car, the longitudinal direction is arranged horizontally, so an elevator rope device 5 can be realized that does not affect the vertical size of the car frame 4.

[0023] Embodiment 2 Fig. 6 is a perspective view showing a main part of an elevator rope device according to a second embodiment of the present invention. Fig. 7 is a plan view showing the elevator rope device of Fig. 6 according to a second embodiment of the present invention. Fig. 8 is a front view showing a main part of the elevator rope device of Fig. 6 according to a second embodiment of the present invention. Fig. 9 is a perspective view showing a main part of the elevator rope device of Fig. 6 according to a second embodiment of the present invention.

[0024] In the figure, the rope device 10 according to embodiment 2 of the present invention differs in that the rope shackle 6 is arranged protruding above the car frame 4, and other similar parts are given the same symbols and their explanations are omitted.

[0025] A rotating shaft 110 that supports the rotation of the oscillating part 11 is fixed to the upper end of the car frame 4. The oscillating part 11 is formed with a oscillating part 111 and a oscillating part 112 centered around the rotating shaft 110. The oscillating part 111 and the oscillating part 112 are arranged linearly with the rotating shaft 110 sandwiched between them.

[0026] The swinging parts 111 and 112 are arranged with their longitudinal directions in a substantially horizontal direction, and can swing in a seesaw manner along the direction in which the tension of the main ropes 2 acts. An end of the main rope 2 is connected to the swinging part 111, and an end of the rope shackle 6 on the anti-spring 60 side is connected to the swinging part 112. The rope shackle 6 is arranged so that the direction in which the spring 60 is displaced is vertical. Here, the end of the main rope 2 and the rope shackle 6 are both arranged above the car frame 4.

[0027] The rotation shaft 110 of the swinging part 11 is disposed midway between the end of the main rope 2 and the shackle rod 61. When the car 1 is suspended by the main ropes 2, the load of the entire car 1 acts on the rotation shaft 110, and this load acts on the car frame 4 via the rotation shaft 110. For this reason, the car frame 4 on which the rotation shaft 110 is disposed is partially reinforced so that the strength of the car frame 4 can withstand the load of the entire car 1 when it acts on the car frame 4.

[0028] Here, the load acting on the car frame 4 from the end of the main rope 2 via the swinging part 11 varies depending on the position where the rotating shaft 110 is disposed. For example, when the rotating shaft 110 is disposed in a position away from the main rope 2 and the vertical frame of the car frame 4, the car frame 4 needs to be reinforced more. Also, when the rotating shaft 110 is disposed in a position close to the vertical frame of the car frame 4, the car frame 4 needs to be reinforced less.

[0029] For example, if the position of the rotation axis 110 is moved too close to the shackle rod 61 in order to reduce the reinforcement of the car frame 4, the load acting on the shackle rod 61 from the swinging part 11 will increase, and the spring 60 will need to be strengthened.

[0030] Therefore, the rotating shaft 110 is positioned midway between the end of the main rope 2 and the shackle rod 61. As a result, the point of application of the load acting on the car frame 4 from the end of the main rope 2 via the swinging part 11 is located close to the vertical frame of the car frame 4, so the car frame 4 does not need to be excessively reinforced and the strengthening of the spring 60 can be minimized.

[0031] A mounting plate 12 on which the rope shackle 6 is placed and supported is provided on the upper surface of the car frame 4. The lower end of the shackle rod 61 of the rope shackle 6 is fixed to one end of the swinging part 11, and the upper end passes through the car frame 4 and the spring 60 and is arranged to protrude upward from the car frame 4. The shackle rod 61 is arranged so that it can move up and down in conjunction with the swinging part 11 when it swings.

[0032] Next, the operation of the second embodiment configured as described above will be described. When the car 1 is suspended from the main ropes 2, a load acts on the rope shackle 6 from the main ropes 2 via the swinging part 11. When this load acts, the swinging part 111 swings upward. When the swinging part 111 swings upward, the swinging part 112 swings downward. When the swinging part 112 swings downward, the shackle rod 61 is displaced downward in conjunction with this. When the shackle rod 61 is displaced downward in conjunction with this, the adjustment bolt 8 is displaced downward in conjunction with this.

[0033] When the adjustment bolt 8 is displaced downward, the lower end face of the adjustment bolt 8 presses against the upper end of the spring 60, compressing the spring 60. Furthermore, when the car 1 moves up and down while suspended from the main ropes 2, the swinging part 11 swings like a seesaw, and the shackle rod 61 moves up and down in conjunction with it. Here, the adjustment bolt 8 presses against and releases from the upper end of the spring 60, so the elastic force of the spring 60 acts. As a result, the car 1 is elastically supported by the main ropes 2.

[0034] Additionally, multiple rope shackles 6 are provided on the top of the car frame 4, and multiple main ropes 2 are also provided, one for each rope shackle 6. The length of the main ropes 2 changes over time as the elevator is used, but the degree of change differs for each main rope 2. For this reason, tension adjustment is required for each main rope 2. This tension adjustment is performed by displacing the fixed position of the adjustment bolt 8 of the rope shackle 6 upward or downward.

[0035] In conventional rope shackles, this tension adjustment is also performed by displacing the position of an adjustment bolt arranged on the rope shackle, but because the rope shackle is arranged between the car frame 4 and the car chamber 3, it is necessary to reach between the car frame 4 and the car chamber 3. With this type of adjustment, reaching between the car frame 4 and the car chamber 3 can put the driver in an awkward position and cause them to lose their balance, making this maintenance work difficult to perform.

[0036] The rope shackle 6 of the present invention is arranged to protrude above the car frame 4, so that when performing maintenance work on the upper part of the car frame 4, the worker can perform the work in a comfortable position without having to assume an awkward posture.

[0037] As described above, according to the second embodiment, the rope shackle 6 is arranged to protrude above the car frame 4 when viewed horizontally, which makes it easier to perform maintenance work on the rope shackle 6 on the car frame 4, and realizes an elevator rope device 5 that allows work to be performed in a safe posture.

[0038] Furthermore, by making the length from the rotating shaft 110 to the end of the main rope 2 the same as the length from the rotating shaft 110 to the rope shackle 6, an elevator rope device 5 can be realized that does not require excessive reinforcement of the car frame 4 and that minimizes the strengthening of the spring 60.

[0039] In the first embodiment, the swinging parts 71 and 72 are arranged at an angle of approximately 90 degrees with the rotation axis 70 sandwiched between them, but they do not necessarily have to be arranged at an angle of approximately 90 degrees. For example, it is easy to form the angle formed by the swinging parts 71 and 72 at an angle other than approximately 90 degrees in accordance with the direction in which the longitudinal direction of the rope shackle 6 is arranged, and it goes without saying that the same effect can be achieved.

[0040] Furthermore, although the longitudinal direction of the rope shackle 6 is arranged in the horizontal or vertical direction, it does not necessarily have to be in either of these directions. For example, depending on the arrangement with other equipment arranged above the car frame, it is easy to arrange it in a direction other than the horizontal or vertical direction, and it goes without saying that the same effect can be achieved.

[0041] In addition, in Example 2, the length from the rotating shaft 110 to the end of the main rope 2 and the length from the rotating shaft 110 to the rope shackle 6 are the same, but they do not necessarily have to be the same length. For example, it is easy to appropriately adjust the ratio of these lengths depending on the weight and strength of the car frame 4, the number of main ropes 2, etc., and it goes without saying that the same effect will be achieved. [Explanation of symbols]

[0042] 1 cage, 2 main rope, 3 cage chamber, 4 cage frame, 5, 10 rope device, 6 rope shackle, 60 spring, 61 shackle rod, 7, 71, 72, 11, 111, 112 swinging part, 70, 110 rotating shaft, 8 adjustment bolt, 9, 12 mounting plate, [Industrial Applicability]

[0043] The present invention relates to an elevator rope device that connects a main rope for suspending a car to a car frame.

Claims

1. A rope device is provided on a car frame that supports a car that moves up and down in an elevator hoistway, and includes elastic bodies that elastically support a plurality of main ropes that suspend the car frame on the car frame, and rope shackles on which the elastic bodies are supported, and connects the main ropes to the car frame, a rotating shaft fixed to the car frame; and a swinging unit rotatably supported by the rotating shaft and swingable along a direction in which tension of the main rope acts, An end of the main rope is connected to one of the swinging parts, and the rope shackle is connected to the other of the swinging parts, The elevator rope device is characterized in that the rope shackle is arranged so that its longitudinal direction protrudes above the car frame when viewed horizontally.

2. 2. The elevator rope device according to claim 1, wherein the swinging portions are arranged at predetermined angles with respect to each other across the rotation axis.

3. 2. The elevator rope device according to claim 1, wherein the rope shackle is disposed so that the direction of displacement of the elastic body is horizontal.

4. 2. The elevator rope device according to claim 1, wherein the length from the rotating shaft to the end of the main rope is the same as the length from the rotating shaft to the rope shackle.

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